Our ignorance far exceeds what we know.
Our ability to know is very limited.
There are probably multiple ways to interpret the data they got coming in. We are just hearing this one, at this time. Likely they will backtrack and invent something new next week to explain this.
There's a cool video on YT that explains how this could happen.
A science teacher sets up a demonstration for his students that allows gravity to be visualized, including how a planet may end up with an orbit in a vertical plane.
See: Gravity Visualized